The Dutch Tax and Customs Administration offers a number of online tools. Most of these are in Dutch. You can contact the Tax Administration via a Tax Information line if you want help. There are different phone numbers for resident and non-resident tax-payers.
Calculate VAT over private use of company car (in Dutch) - See how much VAT (btw) you have to pay when you use a company car privately.
Exchange rate calculation tool for Customs import declaration (in Dutch) - Convert the amount due in import levies from or into your own currency.
Intra Community Acquisition VAT Check Tool (in Dutch) - When you buy goods from a business in another EU country, you may have to declare VAT on your return. Find out if this is so.
Motor Vehicle Tax BPM calculator (in Dutch) - If you own motorcycles or cars, you have to pay motor vehicle tax, depending on weight and type. This tool can help you find out how much BPM you will have to pay.
R&D Tax Credit Tool WBSO (in Dutch) - The WBSO subsidy enables you to deduct part of your Research and Design costs from your tax return. This subsidy is especially helpful for innovative startups, but other companies can benefit too. See if you are eligible.
Services to and from foreign countries VAT calculator (in Dutch) - If you provide services abroad, or receive services from abroad, you may have to defer VAT. Find out what applies to you.
Entrepreneur Check (Ondernemerscheck, in Dutch) - Find out if you are an entrepreneur for tax purposes.